Index Catalog // ScholarsArchive@OSU

Interactions between nitrogen, phosphorus, and molybdenum in forest soils and cyanobacterial lichen in the Oregon Coast Range

Creator:: Marks, Jade A.
Abstract:: Molybdenum is an essential component of biogeochemical cycling, most notably as a component of the nitrogenase enzyme used in biological nitrogen (N) fixation. While the important role of phosphorus (P) in limiting N fixation in ecosystems has been well documented, occurrence and prevalence of molybdenum (Mo) limitation is largely unknown....
Resource Type:: Masters Thesis
Full Text:: . Nitrogen Dynamics of the Oregon Coast Range In the Oregon Coast Range of the Pacific Northwest, USA, the

Interactions between ecosystem nitrogen and bedrock control long-term calcium sources in Oregon Coast Range forests

Creator:: Hynicka, Justin D.
Abstract:: Ecosystem nitrogen (N) supply strongly influences the availability and cycling of other essential nutrients in temperate forests, especially calcium (Ca). Short-term additions of N that exceed ecosystem demands often increase dissolved nitrate fluxes and decrease soil pH, which can stimulate soil Ca loss. However, the long-term effects of high N...
Resource Type:: Masters Thesis
Full Text:: Calcium Sources in Oregon Coast Range Forests Abstract approved

Non-linear nitrogen dynamics and calcium depletion along a temperate forest soil nitrogen gradient

Creator:: Sinkhorn, Emily R.
Abstract:: Understanding how N availability influences base cation stores is critical for long-term ecosystem sustainability. Indices of nitrogen (N) availability and the distribution of nutrients in plant biomass, soil, and soil water were examined across ten young, unpolluted Douglas-fir (Pseudotsuga menziesii) stands in the Oregon Coast Range spanning a three-fold soil...
Resource Type:: Masters Thesis
Full Text:: Douglas-fir (Pseudotsuga menziesii) stands in the Oregon Coast Range spanning a three-fold soil N

Cover crop nitrogen for summer vegetable crops

Creator:: Burket, John Zimmerman, 1953-, Sandeno, J., Hemphill, D., Dick, R., and Oregon State University. Extension Service
Abstract:: Nitrogen (N) is an important nutrient for crop growth. Winter cover crops planted after a commercial crop is harvested, or relay planted before harvest, can provide N for subsequent crops, thus saving money and improving soil quality. Furthermore, cover crops can recover N remaining in the soil following summer crops,...
Resource Type:: Technical Report
Full Text:: (Oregon State University Extension Service) 1 Cover Crop Nitrogen for Summer Vegetable Crops EM 8803

Decomposition and nitrogen dynamics of red alder and Douglas-fir leaf litter in Oregon Coast Range riparian forests

Creator:: Matkins, Joselin
Abstract:: I examined factors regulating decomposition rates of red alder (Alnus rubra)) and Douglas-fir (Pseudotsuga menziesii) leaf litter in Coast Range riparian areas in western Oregon. Overall, this study was designed to examine the influence that leaf litter quality characteristics and decomposition site treatment have on decomposition rates, to provide a...
Resource Type:: Masters Thesis
Full Text:: seasonality in litterfall dynamics in Coast Range riparian forests (Hart 2006). Nitrogen fixation by red

The fate of organic and inorganic nitrogen inputs in an old-growth forest of the central Oregon Cascade Range

Creator:: Holub, Scott M.
Abstract:: Forests in the Pacific Northwest receive very little nitrogen through atmospheric deposition and thus studying the nitrogen cycle in this region can provide insights into how the unpolluted nitrogen cycle functions. I examined the fate of organic nitrogen versus inorganic nitrogen and the effect of tamlins on N retention by...
Resource Type:: Dissertation
Full Text:: Organic and Inorganic Nitrogen Inputs in an Old-growth Forest of the Central Oregon Cascade Range

Calcium-oxalate in sites of contrasting nutrient status in the Coast Range of Oregon

Creator:: Dauer, Jenny M.
Abstract:: Calcium (Ca) is an essential macronutrient that is increasingly recognized as a biogeochemical factor that influences ecosystem structure and function. Progress in understanding the sustainability of ecosystem Ca supply has been hampered by a lack of information on the various forms and pools of Ca in forest ecosystems. In particular,...
Resource Type:: Dissertation
Full Text:: Reserved Calcium-oxalate in Sites of Contrasting Nutrient Status in the Oregon Coast Range by

Experimental analysis of intra- and interspecific competitive interactions between cutthroat trout and sculpins in small streams

Creator:: Ramirez, Ben S.
Abstract:: In the Pacific Northwest ecoregion of North America, sculpins represent a major constituent of freshwater assemblages in coastal rivers. Based on their prevalence and abundance, sculpins are likely important ecologically, yet little is known of their interactions with co-occurring species, such as widely studied salmon and trout (salmonines). In this...
Resource Type:: Masters Thesis
Full Text:: clarkii) were collected from two watersheds in the Coast Range Mountains of Oregon. For the purposes of

Estimation of leaf area index and simulation of evapotranspiration for intensively managed Douglas-fir forests

Creator:: Rogers, Nicole S.
Abstract:: Understanding the tradeoff between water use and productivity is critical for modeling growth of intensively managed Douglas-fir forests in the Pacific Northwest. Evapotranspiration is closely linked to carbon dioxide intake during the process of photosynthesis. However, summer drought characterizing the growing season in this region imposes a limit on carbon...
Resource Type:: Masters Thesis
Full Text:: . Methods were employed across Douglas-fir (Pseudotsuga menzsii) stands in the Oregon Coast Ranges

Two-aged stand management in the Coast Range

Creator:: Grotta, Amy T. and Oregon State University. Extension Service
Abstract:: Forest landowners are interested in practicing alternative silviculture methods on their property without having to clearcut. This publication describes a case study on shelterwood harvest and two-aged stand management of a forest in the Oregon Coast Range. The landowner’s core management philosophy is to create forests that are both ecologically...
Resource Type:: Technical Report
Full Text:: parcel near the town of Timber, in the northern Oregon Coast Range at about 1,000 feet elevation. Ned

ScholarsArchive@OSU

Interactions between nitrogen, phosphorus, and molybdenum in forest soils and cyanobacterial lichen in the Oregon Coast Range

Interactions between ecosystem nitrogen and bedrock control long-term calcium sources in Oregon Coast Range forests

Non-linear nitrogen dynamics and calcium depletion along a temperate forest soil nitrogen gradient

Cover crop nitrogen for summer vegetable crops

Decomposition and nitrogen dynamics of red alder and Douglas-fir leaf litter in Oregon Coast Range riparian forests

The fate of organic and inorganic nitrogen inputs in an old-growth forest of the central Oregon Cascade Range

Calcium-oxalate in sites of contrasting nutrient status in the Coast Range of Oregon

Experimental analysis of intra- and interspecific competitive interactions between cutthroat trout and sculpins in small streams

Estimation of leaf area index and simulation of evapotranspiration for intensively managed Douglas-fir forests

Two-aged stand management in the Coast Range

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